Fianchetto definitions

fē'ən-kĕt'ō, -chĕt'ō
The development in chess of a bishop from its original position to the second square of the adjacent knight's file.
noun
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To develop as or set up a fianchetto.
verb
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To move (a bishop) from its initial position diagonally into the adjacent knight's file.
verb
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(chess) The development of a bishop by moving it one square to a long diagonal; specifically, a set of opening moves where a bishop is developed to the second rank of the adjacent knight file.

noun
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(chess) To develop a bishop by moving it one square to a long diagonal; specifically, a set of opening moves where a bishop is developed to the second rank of the adjacent knight file.
verb
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Origin of fianchetto

Italian diminutive of fianco flank from Old Italian from Old French flanc flank